I was very disapointed in these markers, I bought the Blood Red, and Black Eye. I was expecting the markers to be more opaque like the video showed, and to be hard to buff, neither were the case. I don't believe there is a marker or ink out in the market that is truly "hard to buff, or buff proof." I believe these statements were true 20 years ago, but with all the advancements and money being spent to combat graffiti this is no longer the case.